<template>
  <div class="container">
      <select @change="changeTheme" v-model="theme">
          <option value="">请选择主题</option>
          <option value="chalk">chalk</option>
          <option value="infographic">infographic</option>
          <option value="shine">shine</option>
          <option value="vintage">vintage</option>
          <option value="walden">walden</option>
      </select>

      <button @click="test1">直接样式设计</button>
      <hr>
      <div class="main" ref="main"></div>
  </div>
</template>

<script>
    import echarts from "../utils/mychart"
    import "../theme/chalk.js"
    import "../theme/infographic.js"
    import "../theme/shine.js"
    import "../theme/vintage.js"
    import "../theme/walden.js"

    export default {
        name: 'EchartsStyleView',
        data(){
            return {
                myChart : null,
                theme : "",
                chartOption : {
                    tooltip: {
                        trigger: 'axis', //触发类型；轴触发，axis则鼠标hover到一条柱状图显示全部数据，item则鼠标hover到折线点显示相应数据
                        axisPointer: {  //坐标轴指示器，坐标轴触发有效，
                            type: 'shadow',  //默认为line，line直线，cross十字准星，shadow阴影
                            lineStyle: {
                                color: '#2b4ac8'
                            },
                            crossStyle: {
                                color: '#ff6700'
                            },
                            shadowStyle: {
                                color: "#b0b0b0",
                                opacity : 0.5
                            }
                        }
                    },
                    title: {
                        text: 'ECharts 入门示例'
                    },
                    legend: {
                        data: ['销量']
                    },
                    xAxis: {
                        data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
                    },
                    yAxis: {},
                    series: [
                        {
                            name: '销量',
                            type: 'bar',
                            data: [5, 20, 36, 10, 10, 20]
                        }
                    ]
                }

            }
        },
        mounted(){
            this.renderChart();
        },
        beforeDestroy(){
            if(this.myChart)
                this.myChart.dispose();
        },
        methods :{
            changeTheme(){
                this.myChart.dispose();  // 在变更主题前必须先销毁原来的echarts实例

                this.renderChart(); // 销毁后再创建新的echarts实例
            },
            renderChart(){
                this.myChart = echarts.init(this.$refs.main, this.theme);
                this.myChart.setOption(this.chartOption);
            },
            test1(){
                this.myChart.dispose();
                this.myChart = echarts.init(this.$refs.main, this.theme);
                let data = [
                    [
                        [28604, 77, 17096869, 'Australia', 1990],
                        [31163, 77.4, 27662440, 'Canada', 1990],
                        [1516, 68, 1154605773, 'China', 1990],
                        [13670, 74.7, 10582082, 'Cuba', 1990],
                        [28599, 75, 4986705, 'Finland', 1990],
                        [29476, 77.1, 56943299, 'France', 1990],
                        [31476, 75.4, 78958237, 'Germany', 1990],
                        [28666, 78.1, 254830, 'Iceland', 1990],
                        [1777, 57.7, 870601776, 'India', 1990],
                        [29550, 79.1, 122249285, 'Japan', 1990],
                        [2076, 67.9, 20194354, 'North Korea', 1990],
                        [12087, 72, 42972254, 'South Korea', 1990],
                        [24021, 75.4, 3397534, 'New Zealand', 1990],
                        [43296, 76.8, 4240375, 'Norway', 1990],
                        [10088, 70.8, 38195258, 'Poland', 1990],
                        [19349, 69.6, 147568552, 'Russia', 1990],
                        [10670, 67.3, 53994605, 'Turkey', 1990],
                        [26424, 75.7, 57110117, 'United Kingdom', 1990],
                        [37062, 75.4, 252847810, 'United States', 1990]
                    ],
                    [
                        [44056, 81.8, 23968973, 'Australia', 2015],
                        [43294, 81.7, 35939927, 'Canada', 2015],
                        [13334, 76.9, 1376048943, 'China', 2015],
                        [21291, 78.5, 11389562, 'Cuba', 2015],
                        [38923, 80.8, 5503457, 'Finland', 2015],
                        [37599, 81.9, 64395345, 'France', 2015],
                        [44053, 81.1, 80688545, 'Germany', 2015],
                        [42182, 82.8, 329425, 'Iceland', 2015],
                        [5903, 66.8, 1311050527, 'India', 2015],
                        [36162, 83.5, 126573481, 'Japan', 2015],
                        [1390, 71.4, 25155317, 'North Korea', 2015],
                        [34644, 80.7, 50293439, 'South Korea', 2015],
                        [34186, 80.6, 4528526, 'New Zealand', 2015],
                        [64304, 81.6, 5210967, 'Norway', 2015],
                        [24787, 77.3, 38611794, 'Poland', 2015],
                        [23038, 73.13, 143456918, 'Russia', 2015],
                        [19360, 76.5, 78665830, 'Turkey', 2015],
                        [38225, 81.4, 64715810, 'United Kingdom', 2015],
                        [53354, 79.1, 321773631, 'United States', 2015]
                    ]
                ];
                this.chartOption     = {
                    backgroundColor: {
                        type: 'radial',
                        x: 0.3,
                        y: 0.3,
                        r: 0.8,
                        colorStops: [
                            {
                                offset: 0,
                                color: '#f7f8fa'
                            },
                            {
                                offset: 1,
                                color: '#cdd0d5'
                            }
                        ]
                    },
                    grid: {
                        left: 10,
                        containLabel: true,
                        bottom: 10,
                        top: 10,
                        right: 30
                    },
                    xAxis: {
                        splitLine: {
                            show: false
                        }
                    },
                    yAxis: {
                        splitLine: {
                            show: false
                        },
                        scale: true
                    },
                    series: [
                        {
                            name: '1990',
                            data: data[0],
                            type: 'scatter',
                            symbolSize: function(data) {
                                return Math.sqrt(data[2]) / 5e2;
                            },
                            emphasis: {
                                focus: 'series',
                                label: {
                                    show: true,
                                    formatter: function(param) {
                                        return param.data[3];
                                    },
                                    position: 'top'
                                }
                            },
                            itemStyle: {
                                shadowBlur: 10,
                                shadowColor: 'rgba(120, 36, 50, 0.5)',
                                shadowOffsetY: 5,
                                color: {
                                    type: 'radial',
                                    x: 0.4,
                                    y: 0.3,
                                    r: 1,
                                    colorStops: [
                                        {
                                            offset: 0,
                                            color: 'rgb(251, 118, 123)'
                                        },
                                        {
                                            offset: 1,
                                            color: 'rgb(204, 46, 72)'
                                        }
                                    ]
                                }
                            }
                        },
                        {
                            name: '2015',
                            data: data[1],
                            type: 'scatter',
                            symbolSize: function(data) {
                                return Math.sqrt(data[2]) / 5e2;
                            },
                            emphasis: {
                                focus: 'series',
                                label: {
                                    show: true,
                                    formatter: function(param) {
                                        return param.data[3];
                                    },
                                    position: 'top'
                                }
                            },
                            itemStyle: {
                                shadowBlur: 10,
                                shadowColor: 'rgba(25, 100, 150, 0.5)',
                                shadowOffsetY: 5,
                                color: {
                                    type: 'radial',
                                    x: 0.4,
                                    y: 0.3,
                                    r: 1,
                                    colorStops: [
                                        {
                                            offset: 0,
                                            color: 'rgb(129, 227, 238)'
                                        },
                                        {
                                            offset: 1,
                                            color: 'rgb(25, 183, 207)'
                                        }
                                    ]
                                }
                            }
                        }
                    ]
                };
                this.myChart.setOption(this.chartOption);
            }
        }
    }
</script>

<style>
  .main {
    width: 60vw;
    height: 550px;
    box-shadow: 1px 1px 10px #333;
      margin: 20px auto;
  }
</style>